Some key technologies of 3D visualization GIS, which
include 3D data acquiring, 3D geometry modeling, virtual
reality, 3D spatial analysis, large terrain real-time roaming,
indoor roaming and 3D Web GIS, can be introduced into
geosciences. In this paper, analysis and management method of
spatial information in 3D GIS are used in the process of basin
modelling. According to geometry and mechanical distortion
principle, authors develop the computer simulation and
visualization technique, which use 2D seismic interpretative
profile, tectonic plan map, sedimentary facies map and well log
sheet to generate 3D tectonic-stratigraphic framework of basin,
and also develop the technique to establish spatial information
system of real 3D digital basin. Boundary Replacement (B-Rep)
model, a kind of GIS data structure, is used to describe the
relationship among entities in basin and a set of complete and
practical coding methods and principles of modeling are
brought forward. On the basis of B-Rep model and these
coding methods and principles of modeling, some interpolation
methods are introduced. A new method, similar deformation
interpolation method, is put forward. After establishment of a
basin three-dimensional tectonic-stratigraphic framework,
analysis methods of 3D GIS are introduced to analyze the 3D
digital basin. It is farther discussed how to use 3D GIS analysis
method to realize vector cutting of the 3D digital basin in this
paper. It is also discussed how to use three-dimensional
dynamic analysis technique to simulate the process of
generation, expulsion, migration and accumulation of
petroleum. Spatial database technique of 3D GIS is also
applied to manage, save and search all kinds of vector data,
raster data and attribute data during basin modelling. At the
end of paper, it is expatiated how to use 3D WebGIS to publish
and share three-dimensional tectonic-stratigraphic framework
of basin on the Internet. In short, the B-Rep model, 3D GIS
spatial analysis, 3D GIS spatial database and 3D WebGIS are
introduced into geosciences in this paper.